NetBSD/sys/compat/linux/common/linux_file64.c

223 lines
6.2 KiB
C

/* $NetBSD: linux_file64.c,v 1.2 2000/12/12 22:24:56 jdolecek Exp $ */
/*-
* Copyright (c) 1995, 1998, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Linux 64bit filesystem calls. Used on 32bit archs, not used on 64bit ones.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_fcntl.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/common/linux_machdep.h>
#include <compat/linux/linux_syscallargs.h>
static void bsd_to_linux_stat __P((struct stat *, struct linux_stat64 *));
static int linux_do_stat64 __P((struct proc *, void *, register_t *, int));
/*
* Convert a NetBSD stat structure to a Linux stat structure.
* Only the order of the fields and the padding in the structure
* is different. linux_fakedev is a machine-dependent function
* which optionally converts device driver major/minor numbers
* (XXX horrible, but what can you do against code that compares
* things against constant major device numbers? sigh)
*/
static void
bsd_to_linux_stat(bsp, lsp)
struct stat *bsp;
struct linux_stat64 *lsp;
{
lsp->lst_dev = bsp->st_dev;
lsp->lst_ino = bsp->st_ino;
lsp->lst_mode = (linux_mode_t)bsp->st_mode;
if (bsp->st_nlink >= (1 << 15))
lsp->lst_nlink = (1 << 15) - 1;
else
lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink;
lsp->lst_uid = bsp->st_uid;
lsp->lst_gid = bsp->st_gid;
lsp->lst_rdev = linux_fakedev(bsp->st_rdev);
lsp->lst_size = bsp->st_size;
lsp->lst_blksize = bsp->st_blksize;
lsp->lst_blocks = bsp->st_blocks;
lsp->lst_atime = bsp->st_atime;
lsp->lst_mtime = bsp->st_mtime;
lsp->lst_ctime = bsp->st_ctime;
}
/*
* The stat functions below are plain sailing. stat and lstat are handled
* by one function to avoid code duplication.
*/
int
linux_sys_fstat64(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_fstat64_args /* {
syscallarg(int) fd;
syscallarg(linux_stat64 *) sp;
} */ *uap = v;
struct sys___fstat13_args fsa;
struct linux_stat64 tmplst;
struct stat *st,tmpst;
caddr_t sg;
int error;
sg = stackgap_init(p->p_emul);
st = stackgap_alloc(&sg, sizeof (struct stat));
SCARG(&fsa, fd) = SCARG(uap, fd);
SCARG(&fsa, sb) = st;
if ((error = sys___fstat13(p, &fsa, retval)))
return error;
if ((error = copyin(st, &tmpst, sizeof tmpst)))
return error;
bsd_to_linux_stat(&tmpst, &tmplst);
if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst)))
return error;
return 0;
}
static int
linux_do_stat64(p, v, retval, dolstat)
struct proc *p;
void *v;
register_t *retval;
int dolstat;
{
struct sys___stat13_args sa;
struct linux_stat64 tmplst;
struct stat *st, tmpst;
caddr_t sg;
int error;
struct linux_sys_stat64_args *uap = v;
sg = stackgap_init(p->p_emul);
st = stackgap_alloc(&sg, sizeof (struct stat));
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&sa, ub) = st;
SCARG(&sa, path) = SCARG(uap, path);
if ((error = (dolstat ? sys___lstat13(p, &sa, retval) :
sys___stat13(p, &sa, retval))))
return error;
if ((error = copyin(st, &tmpst, sizeof tmpst)))
return error;
bsd_to_linux_stat(&tmpst, &tmplst);
if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst)))
return error;
return 0;
}
int
linux_sys_stat64(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_stat64_args /* {
syscallarg(const char *) path;
syscallarg(struct linux_stat64 *) sp;
} */ *uap = v;
return linux_do_stat64(p, uap, retval, 0);
}
int
linux_sys_lstat64(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_lstat64_args /* {
syscallarg(const char *) path;
syscallarg(struct linux_stat64 *) sp;
} */ *uap = v;
return linux_do_stat64(p, uap, retval, 1);
}
int
linux_sys_truncate64(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_truncate64_args /* {
syscallarg(const char *) path;
syscallarg(off_t) length;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_truncate(p, uap, retval);
}